A crotch itch; when your crotch itches and you announce "Chonnie Cung!" to everyone around to warn them that you're scratching. Saying "chonnie cung" when you have a chonnie cung makes it acceptable to scratch.

Bri was walking when suddenly she yelled "chonnie cung" and started scratching.

Bri had a chonnie cung, so she announced to her friends, "Chonnie Cung!" and the started scratching.